When drinking I was
always confident that this time would be the last time - but it was a confidence without action, or a confidence based on doing exactly the same things I'd done before....
I (eventually) learned I needed to work hard, especially in the early days, if I wanted to stay sober.
Watch those cravings for example - it's my experience they do return - usually when we least expect them.
I think as long as you're working hard, prepared for anything, and you remember where you've been, you need have no fear of getting over confident
Eventually I found my thoughts shifted from 'I'll never drink again' to 'I really like my life now - I don't want to lose this'....for me it was a subtle but important change
D